refactor: add setup command + uikit build NPM script

Update NPM scripts to include a uikit-specific build command + consolidate `setup` command

Author: sghoweri

package.json

@@ -5,6 +5,8 @@
   "private": true,
   "scripts": {
     "bootstrap": "lerna bootstrap",
+    "setup": "npm run bootstrap && npm run build:uikit",
+    "build:uikit": "lerna exec --scope @pattern-lab/uikit-workshop -- npm run build",
     "precommit": "pretty-quick --staged",
     "prettier": "prettier --config .prettierrc --write ./**/*.js",
     "test": "lerna run test",